Dear R-users,

I would like to know how expressions could be passed as arguments to do.call functions. As illustrated in the short example below, concatenating lists objects and an expression creates an expression object, which is not an acceptable argument for do.call. Is there a way to avoid that?

Thanks you

Sebastien


foo <- list(x=1:10, y=1:10)
mylist <- list(pch=6, col=2)
title <- "1 microgram"
title2 <- expression ("1 " mu "g")

do.call(plot, c(foo, mylist, main=title))

class(c(foo, mylist, main=title2))

do.call(plot, c(foo, mylist, main=title2))

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